Show that M indeed is a reflection. To do this, you need to find a (nonzero) column vector v such that Mv = v, another (nonzero) column vector w such that Mw=-w, and you need v and w to be perpendicular to each other. (This shows that M gives reflection across the line spanned by v, or in other words, Rv is the line of symmetry. Your job is to find v and w.
Show that M indeed is a reflection. To do this, you need to find a (nonzero) column vector v such that Mv = v, another (nonzero) column vector w such that Mw=-w, and you need v and w to be perpendicular to each other. (This shows that M gives reflection across the line spanned by v, or in other words, Rv is the line of symmetry. Your job is to find v and w.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section9.8: Determinants
Problem 24E
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